BD139G Datasheet & Equivalents
NPN
TO-225
High Power
onsemi
VCEO
80V
Ic Max
1.5A
Pd Max
12.5W
hFE Gain
25
Quick Reference
The BD139G is a NPN bipolar junction transistor in a TO-225 package, manufactured by onsemi. It supports a breakdown voltage of 80V and continuous collector current of 1.5A. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | onsemi | Original Manufacturer |
| Package | TO-225 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 80V | Max breakdown voltage |
| Collector Current (Ic) | 1.5A | Max current handling |
| Power Dissipation (Pd) | 12.5W | Max thermal limit |
| DC Current Gain (hFE) | 25 | Base signal amplification ratio |
| Transition Frequency (fT) | - | Max operating frequency |
| Saturation Voltage (VCEsat) | 500mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 5V | Max emitter-base breakdown |
| Collector Cutoff Current | 10uA | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |